MXE: cross-building with --enable-64: Assembly error libgcrypt

[PhilipNienhuis]

Tried to cross-build Octave for Windows with --enable-64, but got this when
builing libgcrypt:

:
libtool: compile:  x86_64-w64-mingw32-gcc -DHAVE_CONFIG_H -I. -I.. -I../src
-I../src
-I/home/philip/devel/octdev/mxe/mxe_082014_64/usr/x86_64-w64-mingw32/include
-I/home/philip/devel/octdev/mxe/mxe_082014_64/usr/x86_64-w64-mingw32/include
-g -O2 -Wall -MT rndhw.lo -MD -MP -MF .deps/rndhw.Tpo -c rndhw.c 
-DDLL_EXPORT -DPIC -o .libs/rndhw.o
/tmp/ccDbQOKt.s: Assembler messages:
/tmp/ccDbQOKt.s:53: Error: unsupported instruction `mov'
make[4]: *** [rndhw.lo] Error 1
make[4]: Leaving directory
`/home/philip/devel/octdev/mxe/mxe_082014_64/tmp-libgcrypt/libgcrypt-1.6.1/random'
:

Is this due to too aggressive optimization? "mov" looks like one of the most
basic CPU instructions to me....

My system: Mageia 2 32-bits (2 years old).

Philip




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